Exploratory Data Analysis by Johns Hopkins University on Coursera

https://www.coursera.org/learn/exploratory-data-analysis

下載資料

Electric power consumption

注意

• 變數分隔符號為 ‘;’
• 2,075,259 個觀測值與 9 個變數
• 只需要使用 2007-02-01 與 2007-02-02 這兩天的資料
• 遺漏值被記錄為 ‘?’

變數資訊上

• Date: Date in format dd/mm/yyyy
• Time: time in format hh:mm:ss
• Global_active_power: household global minute-averaged active power (in kilowatt)
• Global_reactive_power: household global minute-averaged reactive power (in kilowatt)
• Voltage: minute-averaged voltage (in volt)
• Global_intensity: household global minute-averaged current intensity (in ampere)

變數資訊下

• Sub_metering_1: energy sub-metering No. 1 (in watt-hour of active energy). It corresponds to the kitchen, containing mainly a dishwasher, an oven and a microwave (hot plates are not electric but gas powered).
• Sub_metering_2: energy sub-metering No. 2 (in watt-hour of active energy). It corresponds to the laundry room, containing a washing-machine, a tumble-drier, a refrigerator and a light.
• Sub_metering_3: energy sub-metering No. 3 (in watt-hour of active energy). It corresponds to an electric water-heater and an air-conditioner.

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圖形四